Promotes digestion and resolves food stagnation - Ji Nei Jin is a leading digestive aid for stubborn accumulation from grains, starches, dairy, and meat, especially when bloating, poor appetite, nausea, or childhood malnutrition accompany retained food.
Strengthens the Spleen while dispersing accumulation - unlike purely draining digestants, it is used when weak digestive transformation and retained food coexist, such as chronic poor appetite with loose stools and post-illness digestive sluggishness.
Secures essence and stops enuresis - its astringing lower-burner action makes it useful for bedwetting, frequent urination, and seminal emission patterns when Spleen weakness contributes to insecure Kidney-Bladder function.
Softens hardness and dissolves urinary or biliary stones - the raw powdered form is traditionally favored for urinary gravel, small stones, and stubborn mineral accumulation, often paired with Jin Qian Cao or Hai Jin Sha.
Secondary Actions
Ji Nei Jin is widely considered more effective as a swallowed powder than as a long-boiled decoction because prolonged heating can reduce the activity of its enzyme-rich or easily altered fractions.
Processing matters: raw Ji Nei Jin is preferred for stone-dissolving and hard-accumulation use, while the stir-fried form is more often chosen for diarrhea, poor appetite, and lower-burner insecurity.
Classic Formulas
Yi Pi Bing (益脾饼) - Zhang Xichun's Spleen-benefiting cake pairing Ji Nei Jin with Bai Zhu to strengthen weak digestion while dispersing food retention and pediatric malnutrition patterns.
San Jin Tang (三金汤) - stone-dissolving formula pattern based on Ji Nei Jin with Jin Qian Cao and related damp-heat-clearing ingredients for urinary or biliary calculi.
Ji Pi Zi San (鸡脾子散) - classical pattern using Ji Nei Jin with Sang Piao Xiao and related ingredients for bedwetting, frequent urination, and seminal leakage due to insecure lower-burner function.
Classical References
Me and Qi describes Ji Nei Jin as the dried inner lining of the chicken gizzard, sweet and neutral, entering the Spleen, Stomach, Small Intestine, and Bladder channels, with key actions of promoting digestion, strengthening the Spleen, securing essence, and dissolving stones.
The same source notes that Ji Nei Jin is significantly more effective when taken as powder, that the raw form is preferred for stone disorders, and that the stir-fried form is preferred for diarrhea, poor appetite, and enuresis.
Traditional comparisons place Ji Nei Jin above Mai Ya or Shan Zha when food stagnation is severe or chronic and when stone dissolution or lower-burner astringing are also required.
Modern Research
Active Compounds
Protein and peptide fractions such as ventriculin-related materials - the structural matrix most often invoked in the herb's digestive and mucosal-support reputation
Trace digestive enzymes including pepsin- and amylase-like activity - traditionally cited as one reason powdered Ji Nei Jin can outperform prolonged decoction
Bile-acid fractions identified in ethyl acetate extracts - modern chemical work found multiple bile acids in processed GGEC extracts
Glycosaminoglycan-rich tissue components - connective-tissue-derived fractions identified in broader chicken gizzard chemistry work
Amino-acid and keratin-related structural constituents - core nutritional and material components of the dried gizzard lining
Studied Effects
A 2021 study reported that Galli gigeriae endothelium corneum extracts reinforced intestinal barrier function, increased tight-junction proteins, and reduced inflammatory signaling in vitro while also profiling 33 compounds including bile acids and isoflavones (PMID 33593395).
Endothelium corneum gigeriae galli extract inhibited calcium oxalate formation and showed anti-urolithic effects, directly supporting the long TCM use of raw Ji Nei Jin for urinary gravel and stones (PMID 30194056).
A recent review summarizes the expanding chemical profile of GGEC and highlights how modern research has moved beyond crude digestive folklore into bile-acid, peptide, and multi-component chemical characterization (PMID 40771715).
Excess stomach acid or active acid-reflux patterns
Known poultry-protein allergy
Cautions
Powdered Ji Nei Jin is traditionally preferred because prolonged boiling may reduce the activity of its more delicate digestive fractions
Raw powder is usually reserved for stone disorders, while stir-fried Ji Nei Jin is more appropriate for diarrhea, enuresis, and everyday digestive weakness
MSK page not found - drug interaction data not available from Memorial Sloan Kettering integrative medicine database